9 Positioning Control
9.6 Variable Speed Operation
104
FX3U-1PG User's Manual
4. Positioning completion flag
Before and after the variable speed operation, the positioning completion flag does not change.
5. Response time
When operation speed I is changed, the time required to change the speed becomes as follows.
• During operation at 1 kHz or higher: Within 3 ms
• During operation at less than 1 kHz: Within 3 pulses
Setting items of the variable speed operation
Caution of the variable speed operation
• Operation when the STOP command is set to ON during the variable speed operation
The motor stops when the STOP command is set to ON during the variable speed operation, and restarts
the operation when the STOP command is set to OFF.
Example when acceleration/deceleration is provided
BFM No.
Setting items
Positioning
parameter
Extension
positioning
parameter
#0 #34, #33 Pulse rate
#2, #1 #36, #35 Feed rate
#3 b1, b0 #37 b1, b0
Operation parameter
System of units
#3 b5, b4 #37 b5, b4 Position data multiplier
#3 b7 #37 b7
Variable speed operation acceleration/
deceleration setting
#3 b8 #37 b8 Pulse output format
#3 b9 #37 b9 Rotation direction
#3 b11 #37 b11 Limit deceleration mode
#3 b14 #37 b14 STOP input polarity
#3 b15 #37 b15 STOP input mode
#5, #4 #39, #38 Maximum speed
#6 #41, #40 Bias speed
#15 - Acceleration/deceleration time
- #51 Acceleration time
- #52 Deceleration time
#16 Starting delay time
#20, #19 Operation speed Ι
#25 b12 Operation command Variable speed operation
ON
Operation speed I Operation speed I
Speed
Time
Variable speed
operation
(BFM#25 b12)
READY
(BFM#28 b0)
STOP command
(BFM#25 b1 or
STOP terminal)
Positioning completion
flag (BFM#28 b8)
(Does not change)
OFF ON
ON OFF ON ON
OFF OFF
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